: I go through spells of having terribly itchy arms - mostly forearms, sometimes shoulders. Feels more like little prickles or bits, but there is not a mark on my skin to show for it. Mostly happens at night, and the itching sensation gets so bad that it wakes me up. Usually I try putting a cold washcloth on the itching area. If I scratch once, then I have to scratch twice, etc etc. Sometimes, by the time I wake up in the morning, I have scratched so much that I have small scabs on my forearms.

: I have no idea what is causing this. I have many allergies (food, medications, airborne, etc), but can't seem to relate this to anything. Has anyone else had this problem? Any ideas as to what might be causing it?

I have the exact same problem. It is only on my arms that I have the itching. No where else. Strange. I found that calamine or caladryl lotion helps the symptoms. It seems to subside for a while(weeks/months), then get much worse(weeks), then subside again(weeks/months). Any thoughts or ideas someone may have, would be greatly appreciated.